National Provider Identifier
National Imaging Associates, Inc. (NIA) requires providers to submit their National Provider Identifier (NPI) on all HIPAA-standard electronic transactions as of May 23, 2008. This is the date that the Centers for Medicare & Medicaid Services' (CMS) one-year contingency period (or "grace" period) ends. All standard electronic transactions received without NPIs will be rejected.
NPI numbers replace all government-issued identifiers, Medicaid PINs and Medicare UPINs on HIPAA-standard electronic transactions, including provider claims submitted electronically. Taxpayer Identification Numbers (TINs) continue to be required on all claims -- both paper and electronic.
If you have not yet submitted your NPI for inclusion in our records, you can submit your NPI by mailing or faxing your NPI notification letter or e-mail from the National Plan and Provider Enumeration System (NPPES) to:
National Imaging Associates
Attn: Data Management
14100 Magellan Plaza
Maryland Heights, MO 63043
Fax number: 314-387-5584
To apply for your NPI, call 1-800-465-3203 or e-mail 
to
request a paper application. For the fastest receipt of your NPI,
you should apply online at https://nppes.cms.hhs.gov.
Once you have obtained and submitted your NPI to NIA, include this number on all claims that you submit to us. With the close of the contingency period, CMS expects all providers to comply with the NPI initiative, and NIA hopes to avoid rejecting providers' electronic transactions.
For an overview and additional information on NPI, visit the CMS Web site. NIA also has posted Frequently Asked Questions about NPI on this Web site.